Title :
Radiation response on Al-H, alkali-H and other H-related point defects in natural quartz crystals
Author_Institution :
Nat. Phys. Lab., New Delhi, India
fDate :
12/1/1992 12:00:00 AM
Abstract :
Radiation responses of several new OH-related defect centers in unswept, Na-swept, and H-swept natural quartz crystals of high and low-H concentrations were determined. The high-H and the low-H quartz crystals had nearly the same aluminum concentration. Irradiation was done using a Van de Graaff electrostatic accelerator and the defect centers were monitored using near-infrared absorption at 77 K. Crystals were subjected to a sequence of low (77-K) and room-temperature (300-K) irradiations that separate proton and alkali ion motions. The results are discussed in terms of proton and alkali ion motion to shallow and deep traps and compared with those for cultured quartz
Keywords :
OH--centres; deep levels; defect electron energy states; impurity and defect absorption spectra of inorganic solids; infrared spectra of inorganic solids; quartz; radiation effects; 300 K; 77 K; H-related point defects; OH-related defect centers; Van de Graaff electrostatic accelerator; alkali ion motions; deep traps; electrodiffusion; natural quartz crystals; near-infrared absorption; proton motion; radiation response; shallow traps; sweeping; Aerospace industry; Aerospace materials; Crystalline materials; Crystals; Earth; Electromagnetic wave absorption; Laboratories; Oscillators; Radiation effects; Temperature;
Journal_Title :
Nuclear Science, IEEE Transactions on
